Because for the user experience, it is identical to <ul>. Use <menu> if it helps you to understand your code but in the browser's accessibility tree and in all other respects, it's just an unordered list.
Conveying that something is a list of actions requires adding ARIA attributes. The article mentions `role=menu` but that's not enough, each item also needs the `menuitem` role. The WAI Authoring Practices Guide explains the roles and interaction expectations; don't copy their coded examples and definitely don't use the roles for navigation menus.
<ruby> is going to be featured in my next article: You don't know HTML…Semantics.
I'm debating whether that one will be one or two articles because I'm going to be covering everything from <ruby>, <bdi>, <bdo> all the way through <var>, <kbd>, <samp>, <cite>, and <q>.
After that one, I'll probably have something like, "You don't know HTML interactions" or something to cover <dialog>, <popover>, and the Invoker API.
Conveying that something is a list of actions requires adding ARIA attributes. The article mentions `role=menu` but that's not enough, each item also needs the `menuitem` role. The WAI Authoring Practices Guide explains the roles and interaction expectations; don't copy their coded examples and definitely don't use the roles for navigation menus.
https://www.w3.org/WAI/ARIA/apg/patterns/menubar/